216735243 has 8 divisors (see below), whose sum is σ = 291538128. Its totient is φ = 143211264.

The previous prime is 216735217. The next prime is 216735247. The reversal of 216735243 is 342537612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216735243 - 2¹³ = 216727051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216735247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319330 + ... + 320007.

It is an arithmetic number, because the mean of its divisors is an integer number (36442266).

Almost surely, 2^216735243 is an apocalyptic number.

216735243 is a deficient number, since it is larger than the sum of its proper divisors (74802885).

216735243 is a wasteful number, since it uses less digits than its factorization.

216735243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639453.

The product of its digits is 30240, while the sum is 33.

The square root of 216735243 is about 14721.9306818094. The cubic root of 216735243 is about 600.6800095760.

The spelling of 216735243 in words is "two hundred sixteen million, seven hundred thirty-five thousand, two hundred forty-three".